High quality quartz glass bulbs, easy installation. 40% less power consumption than halogen bulbs. 4 times the light intensity than halogen bulbs Life expectancy: 10000-15000 hours. 5 times the lifespan than halogen bulbs Power: 55W Available color temperatures: 6000k Bulb size: H4 Color: As shown Material: Metal Package includes: 4x HID Bi-xenon Hi/Lo dual beam bulbs 35W 55W VS: xenon lamps with 35W of power will bring you unprecedented comfort and safe driving at night. The 55W uses more power to produce more . 55W HID kits generally cost more than 35W HID kits. This is a matter of personal choice. If you need maximum light output, or if you drive in dark conditions, you will want to install a 55W HID kit for more lighting power. HID Temperature and Color: Color is measured and expressed in degrees Kelvin (K). The color spectrum ranges from red to violet. HID headlights do not have this wide of a range, although there are different bulbs that skew toward both extremes. Most are more